| Abbreviation | Definition |
|---|---|
| PXF | Pseudo-exfoliation syndrome |
| PXG | Pseudo-eXfoliative Glaucoma |
| PYE | Protect Your Eyes |
| PYRIL | Pyrilamine Maleate |
| PYRILTAN | Pyrilamine Tannate |
| PYV | Polyomavirus |
| PYV | Protein Yersinia Virulon |
| PYY | Peptide YY |
| PZA | PyraZinAmide |
| PZD | Pellucida Zone Drilling |
| PZH | Panstwowy Zaklad Higieny |
| Q | Every two hours |
| Q | Quaque ( Each or Every) |
| Q | Queasy |
| Q4-8H | Every 4 To 8 Hours |
| QAX | Quick Access to X-ray |
| QBT | Quantum Brain Theory |
| QD | Quaque in Die (every day, once daily) |
| QD | Quick Diagnosis |
| QDS | Quater in Die Sumendus |